<style>
    
  .div2{
      display: flex;
      justify-content: flex-start;
      flex-wrap: wrap;
    }


</style>
<ion-header>
        <ion-navbar>
           <button menuToggle *ngIf="!selectedItem">
               <ion-icon name="menu"></ion-icon>
           </button>
           <ion-title> {{currentPoint}}</ion-title>
           </ion-navbar>
 </ion-header>
<ion-content>
      <ion-list>
          <ion-item *ngFor = "let item of mistakeListByPoints; let i = index">
                   <h4> {{item.editTime}}</h4>
                   <div (click)="gotoShowMistakePage(item)" class="div2">
                       <img src ="{{item.quesPicUrl}}" class="img1"/> 
                    </div>
        
                </ion-item>
             </ion-list>
</ion-content>